Specifications
12
24 690 37 Rev. B
KohlerEngines.com
GENERAL TORQUE VALUES
Metric Fastener Torque Recommendations for Standard Applications
Property Class
Noncritical
Fasteners
Into Aluminum
Size
4.8
5.8
8.8
10.9
12.9
Tightening Torque: N·m (in. lb.) ± 10%
M4
1.2 (11)
1.7 (15)
2.9 (26)
4.1 (36)
5.0 (44)
2.0 (18)
M5
2.5 (22)
3.2 (28)
5.8 (51)
8.1 (72)
9.7 (86)
4.0 (35)
M6
4.3 (38)
5.7 (50)
9.9 (88)
14.0 (124)
16.5 (146)
6.8 (60)
M8
10.5 (93)
13.6 (120)
24.4 (216)
33.9 (300)
40.7 (360)
17.0 (150)
Tightening Torque: N·m (ft. lb.) ± 10%
M10
21.7 (16)
27.1 (20)
47.5 (35)
66.4 (49)
81.4 (60)
33.9 (25)
M12
36.6 (27)
47.5 (35)
82.7 (61)
116.6 (86)
139.7 (103)
61.0 (45)
M14
58.3 (43)
76.4 (56)
131.5 (97)
184.4 (136)
219.7 (162)
94.9 (70)
Torque Conversions
N·m = in. lb. x 0.113
in. lb. = N·m x 8.85
N·m = ft. lb. x 1.356
ft. lb. = N·m x 0.737
English Fastener Torque Recommendations for Standard Applications
Bolts, Screws, Nuts and Fasteners Assembled Into Cast Iron or Steel
Grade 2 or 5 Fasteners
Into Aluminum
Size
Grade 2
Grade 5
Grade 8
Tightening Torque: N·m (in. lb.) ± 20%
8-32
2.3 (20)
2.8 (25)
—
2.3 (20)
10-24
3.6 (32)
4.5 (40)
—
3.6 (32)
10-32
3.6 (32)
4.5 (40)
—
—
1/4-20
7.9 (70)
13.0 (115)
18.7 (165)
7.9 (70)
1/4-28
9.6 (85)
15.8 (140)
22.6 (200)
—
5/16-18
17.0 (150)
28.3 (250)
39.6 (350)
17.0 (150)
5/16-24
18.7 (165)
30.5 (270)
—
—
3/8-16
29.4 (260)
—
—
—
3/8-24
33.9 (300)
—
—
—
Tightening Torque: N·m (ft. lb.) ± 20%
5/16-24
—
—
40.7 (30)
—
3/8-16
—
47.5 (35)
67.8 (50)
—
3/8-24
—
54.2 (40)
81.4 (60)
—
7/16-14
47.5 (35)
74.6 (55)
108.5 (80)
—
7/16-20
61.0 (45)
101.7 (75)
142.5 (105)
—
1/2-13
67.8 (50)
108.5 (80)
155.9 (115)
—
1/2-20
94.9 (70)
142.4 (105)
223.7 (165)
—
9/16-12
101.7 (75)
169.5 (125)
237.3 (175)
—
9/16-18
135.6 (100)
223.7 (165)
311.9 (230)
—
5/8-11
149.5 (110)
244.1 (180)
352.6 (260)
—
5/8-18
189.8 (140)
311.9 (230)
447.5 (330)
—
3/4-10
199.3 (147)
332.2 (245)
474.6 (350)
—
3/4-16
271.2 (200)
440.7 (325)
637.3 (470)
—